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The Physics of Sports PowerPoint PPT Presentation

The Physics of Sports. Fermilab. Tevatron, 4 miles around. Main Injector, 2 miles around. Physics explains things that are very, very large. Physics explains things that are very, very small. Physics explains things that are right in front of us. Newton’s First Law.

The Physics of Sports

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Fermilab

Tevatron,

4 miles around

Main Injector,

2 miles around

Newton’s First Law

• Objects at rest remain at rest

• Objects in motion remain in motion

UNTIL YOU APPLY A FORCE

Newton’s Second Law

F = ma

What forces are important in sports?

The Home Run Swing

• Ball arrives on 100 downward trajectory

• Big Mac swings up at 250

• Ball takes off at 350

• The optimum home run angle!

Courtesy of A. Nathan, University of Illinois. http://www.npl.uiuc.edu/~a-nathan/pob/

Newton’s Third Law

For every action there is an equal and opposite reaction.

Conservation of Energy

Potential Energy

Kinetic Energy

Kinetic Energy

Compression Energy

Heat and Sound Energy

Conservation of Momentum

If m1 = m2, then v1 = v2

Conservation of Momentum

Equipment features

• Ball material, size, shape, and texture

• Properties of the club, bat, racquet, or stick

http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/Daniel_Lenord/vault.html

Resistance & Friction

The Power of Spin

Downhill skier speed: 80 mph

Reaction Time in Baseball

Courtesy of R. Adair through A. Nathan.

Equation used: t = √((2d)/g)

Physical laws explain the world

• Newton’s Laws of Motion

• Conservation of Energy

• Conservation of Momentum

These laws help us explain everything

Physics really is everywhere!

Visit Fermilabwww.fnal.gov

• Buffalo viewing

• Bicycling

• Walking

• Canoeing

• Fishing

Visit Fermilab

• Lederman Science Center

• Tours

• Saturday morning physics